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Forward charging system applied to electric car

A technology for electric vehicles and charging systems, applied in electric vehicles, high-efficiency vehicle charging, battery circuit devices, etc., can solve problems such as the inability to quickly find abnormal voltage single cells, and achieve the effect of improving feedback efficiency and feedback sensitivity

Inactive Publication Date: 2018-04-06
四川隆航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the current equalization system, it is impossible to quickly find out the single battery with abnormal voltage, and then it is impossible to sample the voltage of the single battery with abnormal voltage and then perform forward charging through the feedback circuit

Method used

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Embodiment

[0012] The forward charging system used in electric vehicles includes a battery pack, a DC-DC converter, a single battery, and also includes a monomer voltage measurement circuit, a voltage feedback circuit and a charging control circuit; the primary coil of the DC-DC converter It is connected to the two ends of the battery pack, and its secondary coil is connected to the two ends of the single cell for charging the electric energy of the battery pack to the single cell; the single cell voltage measurement circuit includes a voltage sampling circuit, and the two ends of the single cell Connect with the voltage sampling circuit to obtain the voltage of the single battery; the output terminal of the voltage sampling circuit and the reference voltage are connected to the input terminal of the voltage feedback circuit to generate an error signal, which is then transmitted to the charging control circuit; The charging control circuit is connected to the line connecting the primary c...

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Abstract

The invention discloses a forward charging system applied to an electric car; the system comprises a battery bank, a DC-DC converter, a monomer voltage measuring circuit, voltage feedback circuits andcharging control circuits; two sides of the battery bank and a monocell are respectively provided with a sampling circuit, a feedback circuit and a control circuit; a control signal is formed on thesampling voltage of the battery bank or the monocell, thus controlling the DC-DC converter to open and close. When the first sampling circuit is connected, forward charging can be carried out througha feedback and control process. The system can realize bidirectional charging between the battery bank and the monocell, and can improve the feedback efficiency and feedback sensitivity of forward / backward charging in a battery equalization circuit.

Description

technical field [0001] The invention relates to the field of electric vehicle battery control, in particular to a forward charging system used in the electric vehicle. Background technique [0002] In the battery management system, battery equalization is often used. The equalization technology is an important technology of the battery energy management system that the world is currently researching and developing. After analysis, it is found that if the battery works for a long time under the condition of overcharge or overdischarge , will have a greater impact on the battery and will lead to a decrease in the capacity of the battery. As the battery is used more often, its capacity will decrease accordingly. Moreover, the degree of capacity change is different, even after the same brand of battery is used for the same time, the capacity change is not the same. Since electric vehicles need multiple batteries connected in series to form a battery pack for power supply, gene...

Claims

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Application Information

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IPC IPC(8): H02J7/00B60L11/18
CPCB60L2240/547B60L58/12B60L58/18B60L58/22H02J7/342Y02T10/70Y02T10/72Y02T10/92
Inventor 马明
Owner 四川隆航科技有限公司
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